London to Ottawa South time converter

Ottawa South is 5 hours behind London. When it is 9:00 AM in London, it is 4:00 AM in Ottawa South.

London BST

Wednesday, October 21, 2026

Ottawa South EDT

Wednesday, October 21, 2026

London
United Kingdom
Wed, Oct 21
BSTUTC+1
Ottawa South
Ontario, Canada
Wed, Oct 21
EDTUTC-4-5h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Ottawa South conversion table

Every hour of today in London and the matching time in Ottawa South. Light rows are typical working hours (9:00–18:00).

LondonOttawa South
12:00 AM7:00 PM−1 day
1:00 AM8:00 PM−1 day
2:00 AM9:00 PM−1 day
3:00 AM10:00 PM−1 day
4:00 AM11:00 PM−1 day
5:00 AM12:00 AM
6:00 AM1:00 AM
7:00 AM2:00 AM
8:00 AM3:00 AM
9:00 AM4:00 AM
10:00 AM5:00 AM
11:00 AM6:00 AM
12:00 PM7:00 AM
1:00 PM8:00 AM
2:00 PM9:00 AM
3:00 PM10:00 AM
4:00 PM11:00 AM
5:00 PM12:00 PM
6:00 PM1:00 PM
7:00 PM2:00 PM
8:00 PM3:00 PM
9:00 PM4:00 PM
10:00 PM5:00 PM
11:00 PM6:00 PM

Best time to call or meet

Both sides are at work from 2:00 PM – 6:00 PM in London (9:00 AM – 1:00 PM in Ottawa South).

Daylight saving time and the difference

The difference changes during the year because London and Ottawa South switch clocks on different dates:

  • Oct 21, 2026 – Oct 25, 2026: -5h
  • Oct 25, 2026 – Nov 1, 2026: -4h
  • Nov 1, 2026 – Mar 14, 2027: -5h
  • Mar 14, 2027 – Mar 28, 2027: -4h
  • Mar 28, 2027 – Oct 21, 2027: -5h

Distance

London and Ottawa South are 5,362 km (3,332 miles) apart in a straight line.

More conversions

Ottawa South to LondonLondon to New YorkLondon to Los AngelesLondon to ChicagoLondon to TorontoLondon to São PauloLondon to ParisLondon to BerlinLondon to MoscowLondon to DubaiLondon to New DelhiLondon to BangkokLondon to Singapore
New York to Ottawa SouthLos Angeles to Ottawa SouthChicago to Ottawa SouthToronto to Ottawa SouthSão Paulo to Ottawa SouthParis to Ottawa SouthBerlin to Ottawa SouthMoscow to Ottawa SouthDubai to Ottawa SouthNew Delhi to Ottawa SouthBangkok to Ottawa SouthSingapore to Ottawa South

Questions and answers

What is the time difference between London and Ottawa South?

Ottawa South is 5 hours behind London.

What time is it in Ottawa South when it is 9 AM in London?

When it is 9:00 AM in London, it is 4:00 AM in Ottawa South.

When is the best time to call Ottawa South from London?

Both sides are at work from 2:00 PM – 6:00 PM in London (9:00 AM – 1:00 PM in Ottawa South).

Does the time difference between London and Ottawa South change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.